A type specifier.
A sequence.
A sequence.
A designator for a function.
A designator for a function or
nil
.
The
merge
function has been extended to take any Common Lisp type. The
sequence
will be of type
result-type
unless this is not possible, in which case a
type-error
is signalled.
LispWorks User Guide and Reference Manual - 21 Dec 2011